... steel pipe: 1) Thickness:0.5-60mm 2) Outer diameter10*10mm~600*600mm 3) L:2~11.8m 4) Material: hot dip square steel pipe 1 ... . High Quality: ISO900:2000, API5L, API5CL Product square steel pipesStandardGB/T3091-2001,BS1387,ASTM A53, ASTM A106, EN10219MaterialQ195, ... in bundles, in loose or seaworthy packing , wrapped with steel strip or at sellers optionUsageConstruction, bridge, highway, machinery, and ...